已知x²+2x+1=0,求2x³+4x²+2x-5的值.2x³+4x²+2x-5=2x(x²+2x+1)-5=-5.接上:依据例子完成:1+x+x²+x³=0,求x+x²+x³+···+x^2004的值
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![已知x²+2x+1=0,求2x³+4x²+2x-5的值.2x³+4x²+2x-5=2x(x²+2x+1)-5=-5.接上:依据例子完成:1+x+x²+x³=0,求x+x²+x³+···+x^2004的值](/uploads/image/z/582596-44-6.jpg?t=%E5%B7%B2%E7%9F%A5x%26%23178%3B%2B2x%2B1%3D0%2C%E6%B1%822x%26%23179%3B%2B4x%26%23178%3B%2B2x-5%E7%9A%84%E5%80%BC.2x%26%23179%3B%2B4x%26%23178%3B%2B2x-5%3D2x%28x%26%23178%3B%2B2x%2B1%29-5%3D-5.%E6%8E%A5%E4%B8%8A%EF%BC%9A%E4%BE%9D%E6%8D%AE%E4%BE%8B%E5%AD%90%E5%AE%8C%E6%88%90%EF%BC%9A1%2Bx%2Bx%26%23178%3B%2Bx%26%23179%3B%3D0%2C%E6%B1%82x%2Bx%26%23178%3B%2Bx%26%23179%3B%2B%C2%B7%C2%B7%C2%B7%2Bx%5E2004%E7%9A%84%E5%80%BC)
已知x²+2x+1=0,求2x³+4x²+2x-5的值.2x³+4x²+2x-5=2x(x²+2x+1)-5=-5.接上:依据例子完成:1+x+x²+x³=0,求x+x²+x³+···+x^2004的值
已知x²+2x+1=0,求2x³+4x²+2x-5的值.2x³+4x²+2x-5=2x(x²+2x+1)-5=-5.
接上:
依据例子完成:1+x+x²+x³=0,求x+x²+x³+···+x^2004的值
已知x²+2x+1=0,求2x³+4x²+2x-5的值.2x³+4x²+2x-5=2x(x²+2x+1)-5=-5.接上:依据例子完成:1+x+x²+x³=0,求x+x²+x³+···+x^2004的值
x+x²+x³+···+x^2004
=x(1+x+x²+x³)+x^5(1+x+x²+x³)+x^9(1+x+x²+x³)+...+x^2001(1+x+x²+x³)
=0
x²+2x+1=0,
(x+1)^2=0
则 x=-1
2x³+4x²+2x-5
=-2+4-2-5
=-5
【】
2x³+4x²+2x-5
=2x(x²+2x+1)-5
=0-5
=-5
∵x²+2x+1=0,
∴2x³+4x²+2x-5
=2x(x²+2x+1)-5
=2x×0-5=-5.
有什么问题吗
1+x+x²+x³=0,
x+x²+x³+x⁴+···+x^2004
=x(1+x+x²+x³)+x^5(1+x...
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∵x²+2x+1=0,
∴2x³+4x²+2x-5
=2x(x²+2x+1)-5
=2x×0-5=-5.
有什么问题吗
1+x+x²+x³=0,
x+x²+x³+x⁴+···+x^2004
=x(1+x+x²+x³)+x^5(1+x+x²+x³)+x^9(1+x+x²+x³)+........+x^2001(1+x+x²+x³)
=0+0+0+.....+0
=0
这是坑人的提问,题目不写清楚,谁先回答,谁倒霉!
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